IIa. Profile of Vesuvius, taken from a Photograph of the Observatory in the month of September, 1871.
1. The Cone, on the 13th January, 1871. 2, 2. Lava of 1871.
IIIa. Profile of Vesuvius on the 16th April, 1872, about ten days before the last Conflagration.
IVa. Vesuvius, on the 26th April, 1872, from a Photograph taken in the neighbourhood of Naples.
1. The Observatory. 2. Fossa della Vetrana. 3. Eruption of Smoke and Ashes, with Stones, from the surface of the Lava. 4. The Novelle, St. Sebastiano, and Massa. 5. Lava which took the direction of Resina. 6. Lava which, from the Crater, took the direction of the Camaldoli. 7. The Grain Stores, near Naples. 8. Resina. 9. Torre del Greco. 10. The Camaldoli.
Va. Profile of Vesuvius after the Eruption of the 26th April, 1872, from a Photograph taken near the Observatory.
1, 1. The Fissures of the 26th of April. 2, 3. Small Hill thrown up on the morning of the 26th of April, from below which issued the great current of Lava. 4, 4, 4. The Mouths out of which the Lava issued. 5, 5. The larger Lava Stream, which passed near the Observatory by the Fossa della Vetrana. 6, 6. The other Lava Stream, which, after dividing from the last, took the direction of Resina. 7, 7. The Lava which ran down towards the Camaldoli. 8 & 9. The two Craters on the summit of the Cone.
VIa. The Bifilar Electrometer of Signor Palmieri. (_Details._)
VIIa. The assemblage of the Electroscopic Apparatus of Signor Palmieri, as arranged at the Vesuvian Observatory.
VIII. Professor Palmieri's Seismographic Apparatus.
[A] This small cone, as it appeared on the 1st April, is described and drawn in a Memoir of Professor von Rath, of the University of Bonn, on "Vesuvius on the 1st and 17th of April, 1871."
[B] Eight young medical students perished beneath the lava, with others unknown by name. They were all youths of good promise; their names will be recorded on the marble monument to be erected near the Observatory. They are: Girolamo Pausini, Antonio and Maurizio Fraggiacomo, Francesco Binetti da Molfettu, Giuseppe Carbone da Bari, Francesco Spezzaferri da Trani, and Giovanni Busco da Casamassima and Vitangelo Poli.
[C] If this enormous height of projection really means, that above the brim of the crater, it involves an initial velocity of projection of above 600 feet (British) per second.